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XnviewApplication

CVE-2017-10756

HIGH · 7.8 CVSS v3.0 Published 2017-07-05
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
80/100
Remediation priority · High
Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
XnView Classic for Windows Version 2.40 might allow attackers to cause a denial of service or possibly have unspecified other impact via a crafted .rle file, related to "Data from Faulting Address controls Branch Selection starting at ntdll_77df0000!RtlpRemoveUCRBlock+0x0000000000000046."

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

XnView Classic 2.40 fails to properly validate a crafted .rle (Run-Length Encoded) image file, leading to memory corruption in the Windows ntdll.dll during file parsing. The vulnerability triggers at RtlpRemoveUCRBlock, indicating heap corruption when processing malformed RLE data structures.

MitigationUpgrade to a patched version of XnView Classic; avoid opening untrusted .rle files from unknown sources until the patch is applied.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
XnviewApplication
Affected:= 2.40

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify XnView Classic installation and version
    Locate the XnView installation directory and check the executable version (right-click xnview.exe > Properties > Details, or use: dir /s "C:\Program Files\XnView" or %ProgramFiles%\XnView\xnview.exe)
    Affected if The installed version is XnView Classic 2.40 exactly
  2. Confirm .rle file format support
    Verify that XnView can open or has handlers for .rle files - check File > Open dialog filter, or inspect XnView's configuration for RLE format registration
    Affected if XnView is configured to process .rle files and the RLE codec/decoder module is present
  3. Inspect RLE parsing component
    Examine the XnView installation for RLE-related DLLs or plugins (look for files containing 'rle' in the plugins, formats, or main installation folder)
    Affected if The RLE decoding module exists in the XnView installation directory

You are affected if XnView Classic version 2.40 is installed and the application is capable of opening or processing .rle image files.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Upgrade to a patched version of XnView Classic; avoid opening untrusted .rle files from unknown sources until the patch is applied.

Fix this in Xnview Scoped from the published advisory
  • Consultation4.0 h
  • Implementation12.0 h
  • Testing8.0 h
  • Review / QA4.0 h
28.0 hours of engineering $4,880
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2017-10756 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data